TTJ Holdings Ltd. engages in the design, supply, fabrication, and erection of structural steelworks for use in the construction of buildings, factories, plants, and infrastructures. It operates through the following segments: Structural Steel, Dormitory, and Other. The Structural Steel segment caters to the residential, commercial, and industrial sectors. The Dormitory segment provides rental services. The Other segment operates a testing center and also includes the investment holding activities of the company. Its products include aluminum parapets and bomb shelter door. The firm also offers structural, mechanical, and specialized engineering services. The company was founded by Chwee Teo Hock on August 28, 1992 and is headquartered in Singapore.